Jupiter has two moons, Io and Europa..what are there properties?

Question

Can someone help me please? answer my questions.

Answer 1

Jupiter has, at last count, 62 moons. Not 2. Four are major. heres an article:
Jupiter: Moons

The planet Jupiter's four largest moons are called the Galilean satellites, after Italian astronomer Galileo Galilei, who observed them in 1610. The German astronomer Simon Marius claimed to have seen the moons around the same time, but he did not publish his observations and so Galileo is given the credit for their discovery. These large moons, named Io, Europa, Ganymede, and Callisto, are each distinctive worlds.


Jupiter family portrait
Family Portrait with 4 of Jupiter's satellites: Io, Callisto, Ganymede, and Europa.

Io is the most volcanically active body in the solar system. Its surface is covered by sulfur in different colorful forms. As Io travels in its slightly elliptical orbit, Jupiter's immense gravity causes 'tides' in the solid surface 100 meters (300 feet) high on Io, generating enough heat to give rise to the volcanic activity and drive off any water. Io's volcanoes are driven by hot silicate magma.

Europa's surface is mostly water ice, and there is evidence that it may be covering an ocean of water or slushy ice. Europa is thought to have twice as much water as does Earth. This moon intrigues astrobiologists because of its potential for having a 'habitable zone.' Life forms have been found thriving near subterranean volcanoes on Earth and in other extreme locations that may be analogues to what may exist on Europa. Ganymede is the largest moon in the solar system (larger than the planet Mercury), and is the only moon known to have its own internally generated magnetic field. Callisto's surface is extremely heavily cratered and ancient - a record of events from the early history of the solar system. However, the very few small craters on Callisto indicate a small degree of current surface activity.

The interiors of Io, Europa, and Ganymede have a layered structure (as does Earth). Io has a core, and a mantle of at least partially molten rock, topped by a crust of solid rock coated with sulfur compounds. Europa and Ganymede both have a core; a rock envelope around the core; a thick, soft ice layer; and a thin crust of impure water ice. In the case of Europa, a global subsurface water layer probably lies just below the icy crust. Layering at Callisto is less well defined and appears to be mainly a mixture of ice and rock.

Three of the moons influence each other in an interesting way. Io is in a tug-of-war with Ganymede and Europa, and Europa's orbital period (time to go around Jupiter once) is twice Io's period, and Ganymede's period is twice that of Europa. In other words, every time Ganymede goes around Jupiter once, Europa makes two orbits, and Io makes four orbits. The moons all keep the same face towards Jupiter as they orbit, meaning that each moon turns once on its axis for every orbit around Jupiter.

Pioneers 10 and 11 (1973 to 1974) and Voyager 1 and Voyager 2 (1979) offered striking color views and global perspectives from their flybys of the Jupiter system. From 1995 to 2003, the Galileo spacecraft made observations from repeated elliptical orbits around Jupiter, passing as low as 261 kilometers (162 miles) over the surfaces of the Galilean moons. These close approaches resulted in images with unprecedented detail of selected portions of the surfaces.

Close-up images taken by the Galileo spacecraft of portions of Europa's surface show places where ice has broken up and moved apart, and where liquid may have come from below and frozen smoothly on the surface. The low number of craters on Europa leads scientists to believe that a subsurface ocean has been present in recent geologic history and may still exist today. The heat needed to melt the ice in a place so far from the Sun is thought to come from inside Europa, resulting primarily from the same type of tidal forces that drive Io's volcanoes.

References:

USGS Astrogeology: Gazetteer of Planetary Nomenclature Planetary Body Names and Discoverers

Solar System Dynamics - Planetary Satellite Discovery Circumstances



Jupiter's Moons


1. Io
2. Europa
3. Ganymede
4. Callisto
5. Amalthea
6. Himalia
7. Elara
8. Pasiphae
9. Sinope
10. Lysithea
11. Carme
12. Ananke
13. Leda
14. Thebe
15. Adrastea
16. Metis
17. Callirrhoe
18. Themisto
19. Megaclite
20. Taygete
21. Chaldene
22. Harpalyke
23. Kalyke
24. Iocaste
25. Erinome
26. Isonoe
27. Praxidike
28. Autonoe
29. Thyone
30. Hermippe
31. Aitne
32. Eurydome
33. Euanthe
34. Euporie
35. Orthosie
36. Sponde
37. Kale
38. Pasithee
39. Hegemone
40. Mneme
41. Aoede
42. Thelxinoe
43. Arche
44. Kallichore
45. Helike
46. Carpo
47. Eukelade
48. Cyllene
49. Kore
50. S/2003 J2
51. S/2003 J3
52. S/2003 J4
53. S/2000 J5
54. S/2003 J9
55. S/2003 J10
56. S/2003 J12
57. S/2003 J15
58. S/2003 J16
59. S/2003 J17
60. S/2003 J18
61. S/2003 J19
62. S/2003 J23

Answer 2

Jupiter has about 60 moons. Maybe you knew that and are only interested in the 2 you mentioned.

Io is a fiery world, with lots of active volcanoes and geologic movement.

Europa is an frozen world, with water ice covering the entire moon. Scientists hope that there is microscopic life on Europa in liquid water under all that ice, and are currently researching ways to discover this life by probing the waters of Lake Vostok in Antarctica. Wouldn't it be wonderful if life outside the Earth was located? And so close to home?

Answer 3

Comments: The text of this rumor was roughly accurate when it first began circulating in the summer of 2003, outdated when it went around again in 2005, and just plain false when it appeared for the third time in 2006. It is now 2007, and making the email rounds again. How many times can a "once in a lifetime" event occur? The oscillating orbits of Mars and Earth did, in fact, bring the two planets closer together on August 27, 2003 than at any other time during the past 50,000 years. Though Mars never actually appeared "as large as the full moon" -- not even close -- for a few days in 2003 it was indeed the brightest object in the night sky. In October 2005 another well-publicized "close encounter" occurred, though in that case the planets were about 13 million kilometers further apart than during the 2003 event. Nothing so spectacular is predicted for 2007.

Answer 4

The funny part of all this is, since Galileo began observing Jupiter, he noted that it had 4 "moons" (later called the "Galilean moons"). Until then, people not even suspected that Jupiter had something circling around it.

We know now that Jupiter has more than 60 moons...

Where did you get the notion that Jupiter got only two of them????
And what do you mean by "there (sic) properties?"

Answer 5

Holy crap, how old is the book you got this question from? As others have mentioned, Jupiter has over 60 satellites, four of them were discovered by Galileo over 400 years ago.

Answer 6

Hi. Jupiter has MANY moons. But for Io, http://en.wikipedia.org/wiki/Io_(moon) and Europa, http://en.wikipedia.org/wiki/Europa_(moon)

Answer 7

can yall go in my profile and answer my question bout the math riddle? plz i rlly need help with it